.about_wrap{
    max-width: 7.5rem;
    .header {
        width: 7.5rem;
        border-bottom: 1px solid #DEDEDE;
        background: white;
        text-align: center;
        position: fixed;
        z-index: 100;

        img {
            transform: rotate(180deg);
            width: 0.2rem;
            height: 0.35rem;
            display: block;
            padding: 0.4rem 0;
            margin-left: 0.46rem;
        }

        span {
            position: absolute;
            top: 0.4rem;
            left: 50%;
            margin-left: -0.55rem;
            font-size: 0.34rem;
            color: #333333;
        }
    }

    .about-txt{
        padding: 1.5rem .35rem 0;
        p{
            font-size: 0.28rem;
            padding-bottom: 0.2rem;
        }
    }
}